4. A penny at rest is dropped from a cliff. Neglecting air resistance, what is its velocity after falling for 8.0 s? Given Formula Substituted Answer with Formula & Solve correct units. 5. How long does the penny (in the previous question) take to fall 100m? Given Formula Substituted Answer with Formula & Solve correct units. 6. What is the penny's velocity after falling 100 m? Given Formula Substituted Answer with Formula & Solve correct units. 7. You throw a ball straight up at 25 m/s. The ball goes up and eventually stops. How far up did the ball travel? Answer with Given Formula Substituted Formula & Solve correct units On a separate graph paper, sketch the d vst, v vst, and a vs t graphs for the following: 8. A car coming toward (the sensor) at constant velocity, then braking to a stop. 9. A ball thrown straight up (from the sensor), and falling back straight down.Name: Date: Period: Motion Problems Wes 2.7 In the space provided, identify all given variables, write the appropriate equation, substitute & solve. Use acceleration due to gravity (g) = 10.0 m/s Show all work and answer in correct units. Equations: Vavg= Ax Vavg= Vf + Vi c2 = a2 + 62 At 2 a = Vf - Vi t = Vf - Vi Vi = at + Vi a Ay = 1/2at 2 +vit v/2 = vi2 + 2aAy 1. What is the average speed of a horse that runs 3 mi east, then 4 mi south in 0.2 hours ? Given Formula Substituted Answer with Formula & Solve correct units. 2. A car accelerates from rest to 30 m/s in 5.0 s. What was the car's acceleration? Given Formula Substituted Answer with Formula & Solve correct units. 3. A moving object accelerates 2.0 m/s2 in 10.0 s to reach a final speed of 35. m/s. What was its initial speed? Given Formula Substituted Answer with Formula & Solve correct units